<template>
   <div class="List" ref="wrapper">
      <div>
          <div class="area">
          <div class="title border-topbottom">当前城市</div>

          <div class="button-list">
             <div class="button-wrapper">
                  <div class="button">{{this.currentCity}}</div>
             </div>
            
          </div>
      </div>

       <div class="area">
          <div class="title border-topbottom">热门城市</div>

          <div class="button-list">
             <div class="button-wrapper" 
             v-for="item of hot" :key="item.id"
             @click="handleCityClick(item.name)"
             >
                  <div class="button">{{ item.name }}</div>
             </div>
             
          </div>
      </div>
        <div class="area" v-for="(item,key) of cities" 
            :key="key" :ref="key">

            <div class="title border-topbottom">{{ key }}</div>
            <div class="item-list">
                <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id"
                @click="handleCityClick(innerItem.name)">
                    {{ innerItem.name}}
                </div>
               
            </div>
        </div>

      
      </div>
   </div>

</template> 
   
<script>
import Bscroll from "better-scroll";
import { mapState, mapMutations } from "vuex";
export default {
  name: "CityList",
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleCityClick(city) {
      //   alert(city);
      //   this.$store.commit("changeCity", city);
      this.changeCity(city);
      this.$router.push("/");
    },
    ...mapMutations(["changeCity"])
  },
  computed: {
    ...mapState({
      currentCity: "city"
    })
  },
  mounted() {
    this.scroll = new Bscroll(this.$refs.wrapper);
  },
  watch: {
    letter() {
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        this.scroll.scrollToElement(element);
        // console.log(element);
      }
    }
  }
};
</script>

<style lang="stylus" scoped >
@import '~styles/varibles.styl';

.border-topbottom {
    &:before {
        border-color: #ccc;
    }

    &:after {
        border-color: #ccc;
    }
}

.border-bottom {
    &:before {
        border-color: black;
    }
}

.List {
    position: absolute;
    top: 1.58rem;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;

    .title {
        line-height: 0.54rem;
        background: #eee;
        padding-left: 0.2rem;
        color: #666;
        font-size: 0.26rem;
    }

    .button-list {
        overflow: hidden;
        padding: 0.1rem 0.6rem 0.1rem 0.1rem;

        .button-wrapper {
            float: left;
            width: 33.33%;

            .button {
                margin: 0.1rem;
                text-align: center;
                border: 0.02rem solid #ccc;
                padding: 0.1rem 0;
                border-radius: 0.06rem;
            }
        }
    }

    .item-list {
        .item {
            line-height: 0.76rem;
            color: #666;
            padding-left: 0.2rem;
        }
    }
}
</style>
 